Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for +publisher:"Universidade Estadual de Campinas" +contributor:("Fernandes, David"). Showing records 1 – 2 of 2 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


Universidade Estadual de Campinas

1. Bins, Leonardo Sant'Anna, 1961. Estimação de fase absoluta e de linha de base em radar interferométrico de abertura sintética com múltiplas antenas: Absolute phase and baseline estimation for interferometric synthetic aperture radar using multiple antennas.

Degree: 2014, Universidade Estadual de Campinas

Abstract: Two important issues in SAR interferometry (InSAR) are absolute phase and baseline estimation. The precise knowledge of these parameters is essential for the production of digital elevation models with high accuracy. The absolute phase estimation can be done in two steps. The first step performs the unwrapping of the phase, which retrieves the 2? multiples of the phase. The second step estimates the phase offset caused by a combination of errors in the acquisition system and in SAR interferometry (InSAR) processing. The baseline estimation determines the relative position of the slave antenna with respect to the master antenna (reference antenna). The contributions of this thesis consist in the design and implementation of three methods that use multiple antennas to address the above issues. The first method performs the unwrapping of the phase in a pixel based fashion, by iteratively unfolding the phase corresponding to each interferograma, followed by maximum likelihood fusion of the unwrapped phases. The second method refines the absolute phase estimation of the first step by incorporating a phase offset estimation based on multiple, noncollinear, antennas. This is achieved by minimizing the geometrical distortion (relative error) in the reconstructed digital elevation model induced by erroneous phase offsets in the interferograms. One advantage of this method is that it does not require the deployment of corner reflector in the area to be imaged. Lastly, the third method deals with baselines estimation. A baseline is determined by the relative positions of the slave and master antennas. The estimation is performed with a greedy stochastic algorithm of Monte Carlo type which uses corner reflectors with precisely known positions. A new position for the slave antenna is accepted when the mean square error of the corner reflector positions is reduced Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Costa, Max Henrique Machado, 1950- (advisor), Universidade Estadual de Campinas. Faculdade de Engenharia Elétrica e de Computação (institution), Programa de Pós-Graduação em Engenharia Elétrica (nameofprogram), Neto, João Roberto Moreira (committee member), Fernandes, David (committee member), Filho, Jose Candido Silveira Santos (committee member), Ohishi, Takaaki (committee member).

Subjects/Keywords: Interferometria; Radar; Interferometry; Radar

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Bins, Leonardo Sant'Anna, 1. (2014). Estimação de fase absoluta e de linha de base em radar interferométrico de abertura sintética com múltiplas antenas: Absolute phase and baseline estimation for interferometric synthetic aperture radar using multiple antennas. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/261023

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Bins, Leonardo Sant'Anna, 1961. “Estimação de fase absoluta e de linha de base em radar interferométrico de abertura sintética com múltiplas antenas: Absolute phase and baseline estimation for interferometric synthetic aperture radar using multiple antennas.” 2014. Thesis, Universidade Estadual de Campinas. Accessed October 20, 2020. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261023.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Bins, Leonardo Sant'Anna, 1961. “Estimação de fase absoluta e de linha de base em radar interferométrico de abertura sintética com múltiplas antenas: Absolute phase and baseline estimation for interferometric synthetic aperture radar using multiple antennas.” 2014. Web. 20 Oct 2020.

Vancouver:

Bins, Leonardo Sant'Anna 1. Estimação de fase absoluta e de linha de base em radar interferométrico de abertura sintética com múltiplas antenas: Absolute phase and baseline estimation for interferometric synthetic aperture radar using multiple antennas. [Internet] [Thesis]. Universidade Estadual de Campinas; 2014. [cited 2020 Oct 20]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/261023.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bins, Leonardo Sant'Anna 1. Estimação de fase absoluta e de linha de base em radar interferométrico de abertura sintética com múltiplas antenas: Absolute phase and baseline estimation for interferometric synthetic aperture radar using multiple antennas. [Thesis]. Universidade Estadual de Campinas; 2014. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/261023

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Universidade Estadual de Campinas

2. Silva, Ana Lucia Mendes Cruz Silvestre da. Procedimentos para metodo hibrido de compressão de imagens digitais utilizando transformadas Wavelet e codificação fractal.

Degree: 2005, Universidade Estadual de Campinas

Abstract: The major drawback in the implementations of the fractal image compression is the exhaustive inherent encoding time. The objective of this research is to introduce a new approach to accelerate the fractal image coding through the application of the DWT and its properties without decrease in the PSNR as well as in the subjective visual quality. Thus, this work presents a New Fast Hybrid Fractal-Wavelet Image Coder that applies the accelerated fractal compression to wavelet transformed images by exploiting the directional correlation of the wavelet subimages. This kind of correlation was noticed by Shapiro in a different context [2]. The proposed scheme promotes better visual quality (compatible to the PSNR measures) and an average reduction of about 80% in encoding-decoding time when compared to the results of the pure accelerated fractal coding for several images and bitrates. Furthermore, the image details and the characteristics of wavelet progressive transmission are maintained; blocking effects, usually found in pure fractal coders, are not introduced. The results of this work demonstrate the potential of the fractal-wavelet hybrid compression as a powerful tool to be further explored. Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Iano, Yuzo, 1950- (advisor), Universidade Estadual de Campinas. Faculdade de Engenharia Elétrica e de Computação (institution), Programa de Pós-Graduação em Engenharia Elétrica (nameofprogram), Fernandes, David (committee member), Yakamani, Akebo (committee member), Costa, Max Henrique Machado (committee member), Sablon, Vicente Idalberto Becerra (committee member), Veiga, Antonio Claudio Paschoarelli (committee member).

Subjects/Keywords: Televisão digital; Compressão de imagens; Wavelets (Matemática); Fractais; Compressão de dados (Telecomunicações)

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Silva, A. L. M. C. S. d. (2005). Procedimentos para metodo hibrido de compressão de imagens digitais utilizando transformadas Wavelet e codificação fractal. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/260323

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Silva, Ana Lucia Mendes Cruz Silvestre da. “Procedimentos para metodo hibrido de compressão de imagens digitais utilizando transformadas Wavelet e codificação fractal.” 2005. Thesis, Universidade Estadual de Campinas. Accessed October 20, 2020. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260323.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Silva, Ana Lucia Mendes Cruz Silvestre da. “Procedimentos para metodo hibrido de compressão de imagens digitais utilizando transformadas Wavelet e codificação fractal.” 2005. Web. 20 Oct 2020.

Vancouver:

Silva ALMCSd. Procedimentos para metodo hibrido de compressão de imagens digitais utilizando transformadas Wavelet e codificação fractal. [Internet] [Thesis]. Universidade Estadual de Campinas; 2005. [cited 2020 Oct 20]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/260323.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Silva ALMCSd. Procedimentos para metodo hibrido de compressão de imagens digitais utilizando transformadas Wavelet e codificação fractal. [Thesis]. Universidade Estadual de Campinas; 2005. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/260323

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.